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i40iw: Add NULL check for puda buffer

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i40iw_puda_get_listbuf may return NULL if the list is empty.
Add NULL check prior to accessing the pointer.

Signed-off-by: Mustafa Ismail <mustafa.ismail@intel.com>
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Mustafa Ismail 2016-07-12 11:48:46 -05:00 committed by Doug Ledford
parent 8c1ea86d44
commit da5c138185
1 changed files with 4 additions and 0 deletions
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4
drivers/infiniband/hw/i40iw/i40iw_puda.c
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@ -1025,6 +1025,8 @@ static void i40iw_ieq_compl_pfpdu(struct i40iw_puda_rsrc *ieq,
u16 txoffset, bufoffset; u16 txoffset, bufoffset;
buf = i40iw_puda_get_listbuf(pbufl); buf = i40iw_puda_get_listbuf(pbufl);
if (!buf)
return;
nextseqnum = buf->seqnum + fpdu_len; nextseqnum = buf->seqnum + fpdu_len;
txbuf->totallen = buf->hdrlen + fpdu_len; txbuf->totallen = buf->hdrlen + fpdu_len;
txbuf->data = (u8 *)txbuf->mem.va + buf->hdrlen; txbuf->data = (u8 *)txbuf->mem.va + buf->hdrlen;
@ -1048,6 +1050,8 @@ static void i40iw_ieq_compl_pfpdu(struct i40iw_puda_rsrc *ieq,
fpdu_len -= buf->datalen; fpdu_len -= buf->datalen;
i40iw_puda_ret_bufpool(ieq, buf); i40iw_puda_ret_bufpool(ieq, buf);
buf = i40iw_puda_get_listbuf(pbufl); buf = i40iw_puda_get_listbuf(pbufl);
if (!buf)
return;
bufoffset = (u16)(buf->data - (u8 *)buf->mem.va); bufoffset = (u16)(buf->data - (u8 *)buf->mem.va);
} while (1); } while (1);